Why do my files not add up to used disk capacity?

OS 10.3.x, G4 powermac.
Main disk
This is not a small difference ( block usage, 1024 vs 1000 bytes etc)
I have a hard disk, capacity ~35GB
If i add up the folders, its roughly 18-19 GB
It shows 28.8 GB used, 7 GB free
Huh?
I have launched tinkertool and looked for large hidden folders and files. There are none.
FYI, the original disk had tghe same problem ; i used CCC to clone it to this one and it reoccured, even after a completre, clean copy to a newly partitioned disk. For the record the disk does have two partitions, both HFS+/J.
Thanks,
Grant

Yes, it can be confusing. It happens because restricted folders are automatically reported as size zero, as I mentioned.
In my own system, I have a large user account which I'll abbreviate as "d", and two very small user accounts named "j" and "t". When I am logged into the small "t" account, the main /Users folder is reported as only 1.14 GB. The "d" home folder is reported as 101MB, although it is actually very large. All its main subfolders have red badges and are reported as size zero:
However when I am logged into the large "d" account, the /Users folder is now reported as 131.95GB and the "d" home folder is 131.19GB. The "d" subfolders are now accessible, and their true sizes are shown:
wrongly report the contents to the root admin?
Actually there are several levels of user privileges, and your admin account is not "root". The true "root" user is sometimes called the "superuser", and is not constrained by permission restrictions. Had you actually logged in as root, all the numbers would have added up correctly. The "root" account is disabled by default, though, and should never be used unless you know exactly what you are doing. A mistake while logged in as root could destroy your system.

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user8710159 wrote:
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